Improvement in fire-backs



J. E. BOYER; Pire-Back.

No. 217,443. Patented July 15, 1879.;

FITQI/l.

NV PETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D. C-

UNITED STATES PATENT OEEIGE.

JOSIAH E. BOYER, OF DAYTGN, OHIO.

IMPROVEMENT IN Fl RE-BACVKS.

Specification forming part of Letters Patent No. 217,443, dated July 15, 1879; application iiled January 11, 1879.

To all lwhom it 'may concern Be it known that I, J osmn E. BOYER, of Dayton, in, the county of Montgomery and State of Oliio, have invented certain new and useful Improvements iu Fire-Backs; and I do hereby declare the following to be a fnll,clear,

and exact description of the same.

The object of my invention is to produce an improved fire-back for cook-stoves which shall be adjustable, so as to iit hre-pots or nre-boxes of various widths and depths.

'Ihe novelty consists in the construction and relative arrangement of the parts forming the tire-back, as will be herewith set forth and specifically claimed.

In the accompanying drawings, Figure l is a front elevation of my improved fire-back. Fig. 2 is a rear view-of the same. Fig. 3 is a longitudinal sectional view through the line .fr x of Fig. 1. Fig. 4. is a transverse sectional viewthrough the line y y of Fig. 2.

'Io construct my lire-back I take two castings, A and B, of the shape indicated, which, when united, form aire-back havingin transverse section a Vserrated form, as shown in Fig. 4. These portionsit upon each other-that is, their ends are overlappedand they are united by a central clamping bolt or screw, c,

- which passes through a horizontal slot,`d, in`

the portion B, as shown in Fig. 2. The overlapping portion e of the casting A is raised above the plane of the portion j', as seen in Fig. 3, thus forming, when the pieces A and Bare united, a panel, e, upon the fire-back, as

indicated in Fig. 1, and thus bringing the portions B and f in the same plane. This construction forms a fire-back, which, by sliding the parts upon each other, can be lengthened or shortened to fit lire-boxes of various widths.

To adjust the parts the nut upon the screwbolt cis loosened, so that the parts can slide upon each other to effect the proper adjustment, and then the nut is screwed down to clamp the parts together.

'Io further increase its adaptability to iireboXesof different depths, I apply adjustable extension-pieces O and D to the inner lower edges of the portions B and f, as seen in Fig. 2. These pieces are flat castings, of a length corresponding to that of the respective portions upon which they are iitted. They have transverse vertical slots g and h through them, by which they are attached with screw-bolts to the portions B and f, as shown in Fig. 2. As can be readily understood, these pieces are capable of vertical adjustment upon the fire-back, so as to increase or diminish its width. Ii' desired, these pieces O and D can be made to overlap each other, as indicated in Fig. 2, in which case the overlapping portion of the piece D might fit either at the rear side or between the extension-pieces and the -re-back. The latter arrangement is that shown in the drawings.

By the foregoing construction I provide a simple and durable nre-back, capable of adjustment both lengthwise and transversely, or. both in its length and its width.

. I am aware that it is not new to construct nre-backs ofseparate pieces which are adjustable upon each other, one or more of such pieces being bent to overlap au adjacent part, and consequently I do not claim, broadly, an extensible nre-back thus constructed.

I claim as follows:

The herein-described lire-back, consisting of the longitudinally-corrugated portions A and B, the former of which is bent out of its plane to overlap the other and form a central raised corrugated panel, said portions having adjustably attached to their lower rear portions eXtensible sections C and D, the whole constructed and united as described, and forming a fireback capable of adjustment longitudinally and transversely, as set forth.

Witness my hand this 26th day of December, A. D. 1878.

.IosIA'E E. BOYER.

Witnesses:

PATRICK H. GUNGKEL, WM. RIToHrE. 

